Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ba2355442b3edc…

MALICIOUS

PDF

70.1 KB Created: 2021-09-04 10:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e2cac105b280b80adf4451996b88814 SHA-1: 3e15d55969bba182bebface13479341f046666f4 SHA-256: 32ba2355442b3edcbb8268693661c4c5b8a5a1dcc34d8b76737147b3ea17ad57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests the document's purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://thuocnam.xyz/images/files/mowuwoxogenax.pdf
    • https://sapporomn.com/userfiles/files/6413822765.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16123c36065eed---punanakenopiwigekobil.pdf
    • https://annjulieskarpmo.com/userfiles/file/56370875596.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/bb5c0e5fac66e912df42f9c82168749d/19015779111.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbcc69f0b40---videfukamolivot.pdf
    • https://fruitssupplier.com/app/webroot/img/files/19014668363.pdf
    • https://tidymoney.com/ckfinder/userfiles/files/24481845599.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/6cc3119863c324b6dbe200cc3b3f8797/43723648952.pdf
    • https://jbdclothiers.net/emailer/userfiles/file/nagozidiwijojan.pdf
    • http://abwninemile.com/uploads/files/figiveriw.pdf
    • https://enerjimakine.com/tsrm1/img/userfiles/file/revafazoxoboko.pdf
    • http://mtecommerce.it/public/news/file/menel.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098938e236d1---26598745900.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/imrmj3ac67q1hc9hodukb3nau5/63495256920.pdf
    • https://srldirect.com/ckfinder/userfiles/files/47741353122.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d4a162fc---92649956290.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ukm4dhjoi8pth42g93amitfko3/48098119648.pdf
    • http://botosani.ro/img/uploads/file/favexowinulebobolibupiwis.pdf
    • http://bidwoodmachine.com/d/files/dimuwapumefolisewu.pdf
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/89262754454.pdf
    • http://hsaltsj.com/uploads/files/69558679599.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fiasco+frank+partnoy+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b35b.bin
4d85c0dc0f15e23e38a3bc29bd03f397b383ce5af60097db7f854815925e05c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB35B 15392 bytes
font_01_sfnt_off0000da34.bin
a9933a110a0393771c510919d6959d8512b7f00282cfa1de0d691c642bbca17e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 10620 bytes
font_02_sfnt_off0000f2a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 16792 bytes